Preemptively fix tests that are about to break

Apply these changes if JuliaLang/julia#47369
gets merged.

The error message for MethodError currently applies to both calls to
functions and `invoke()`, but did not specify which the error came from.
Fixing this will break some tests, hence this PR.

docs/src/attribute.md

@@ -278,7 +278,7 @@ When we normalize attribute names, we strip leading underscores.
 We don't expand into attributes things that don't look like attributes.
 
     @htl "<tag $(3)/>"
-    #-> ERROR: MethodError: no method matching inside_tag(::Int64)⋮
+    #-> ERROR: MethodError: no method matching for call to inside_tag(::Int64)⋮
 
 One can add additional attributes following a bare name.